In steel construction purlins can have different shapes.
Roof framing c purlins trusses.
Purlins 24 spacing mike the pole barn guru writes.
We provide angle iron steel trusses in gable lean to and header styles.
An added benefit are the strong lines that purlins create by running parallel to the ridge beam s.
C channel purlins are manufactured from hi tensile zinc coated steel strips the processing is cold rolled by machine the steel standards of c channel are q195 235 345 which is meaning the yield strength no less than 195 235 345mpa the zinc coating is 60 275g m coating mass.
Pre welded purlin cups predrilled bolt holes and included mounting hardware for fast easy installation.
When they are in hangers the load stress in on the purlins edge but the lateral stress allows the trusses to move independently.
Timber frame truss and purlins.
Purlins placed flat will not span eight feet so eliminates this option.
Trusses most likely on 8 s.
On a typical roofing frame layout they reside between the roof truss and the roof panels.
Stock sizes include gables from 20 to 40 wide and lean to styles in 12 and 20 wide.